[_emacsomancer_]

Thanks! I had known (but forgotten) about the Cognitect one, but defn is new to me.

I also came across (not a Lisp-devoted series admittedly) but an episode of another podcast which focusses on Racket [https://softwareengineeringdaily.com/2015/11/04/racket-with-...].

I haven't found any podcast series devoted to (Common) Lisp or Scheme so far though.